dolfin team mailing list archive

["Garth N. Wells" <gnw20@xxxxxxxxx>]

Anders Logg wrote:
> On Wed, Sep 30, 2009 at 05:25:01PM +0100, Garth N. Wells wrote:
> > DOLFIN wrote:
> > > One or more new changesets pushed to the primary dolfin repository.
> > > A short summary of the last three changesets is included below.
> > >
> > > changeset:   7190:f53c5b481d28
> > > tag:         tip
> > > user:        "Garth N. Wells <gnw20@xxxxxxxxx>"
> > > date:        Wed Sep 30 17:07:18 2009 +0100
> > > files:       dolfin/fem/Form.cpp dolfin/fem/Form.h dolfin/fem/UFC.cpp dolfin/function/SpecialFunctions.cpp dolfin/function/SpecialFunctions.h
> > > description:
> > > Prepare for probable removal of Function::Functon().
> > >
> > > Make appropriate class in SpecialFunctions subclasses of Expression.
> > DOLFIN can be compiled now without the constructor Function::Function(),
> > but the demos can't. Need to think about how functions can be best
> > initialised in the generated code.
>
> Either we specify it at the time of construction:
>
>   Function u(V);
>   problem.solve(u);

I've already done something along these lines VariationalProblem.

> or we let problem hold the function and return it by reference:
>
>   Function&u = problem.solve();
>
> I'll start with the first option since it's less magic.

The issue is with functions that we attach to forms - I guess we just 
need to define them all with a function space (can be tedious when there 
are a lot).

Garth

> --
> Anders
>
>
> > Garth
> >
> > > changeset:   7189:3782f3222642
> > > user:        "Garth N. Wells <gnw20@xxxxxxxxx>"
> > > date:        Wed Sep 30 16:52:58 2009 +0100
> > > files:       demo/pde/poisson/cpp/main.cpp dolfin/fem/Assembler.cpp dolfin/fem/Form.cpp dolfin/fem/Form.h dolfin/fem/SystemAssembler.cpp dolfin/fem/VariationalProblem.cpp dolfin/function/SpecialFunctions.h
> > > description:
> > > Return shared_ptr to FunctionSpaces from Form rather than references.
> > >
> > > This makes it possible to initialise Functions without fear that the function space will go out of scope. See VariationalProblem.
> > >
> > >
> > > changeset:   7188:437ee8b12a41
> > > user:        "Garth N. Wells <gnw20@xxxxxxxxx>"
> > > date:        Wed Sep 30 16:04:46 2009 +0100
> > > files:       demo/pde/poisson/cpp/main.cpp dolfin/function/Function.cpp dolfin/function/Function.h
> > > description:
> > > Remove some code.
> > >
> > > ----------------------------------------------------------------------
> > > For more details, visit http://www.fenics.org/hg/dolfin
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